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Table 1 Results from the postal survey.

From: Eradication of scrapie with selective breeding: are we nearly there?

  GSF sample SF sample
  (n = 168)* (n = 689)
Ewes per farm   
   Mean 31.7 31.1
   St. dev 56.7 48.6
Presence of breeds**   
   Texelaar 56.6% 55.8%
   Swifter 29.8% 34.0%
   Zwartbles 16.0% 12.5%
   Bleu de Maine 8.9% 3.3%
   Blauwe Texelaar 7.1% 3.9%
   Minor breeds 30.4% 38.3%
No. breeds per farm   
   1 53.4% 49.6%
   2 34.5% 39.5%
   3 10.1% 8.7%
   > 3 2.0% 2.3%
ARR/ARR selection ram *   
   All breeds 84.9% 68.3%
   Texelaar 89.9% 71.2%
   Swifter 91.5% 76.4%
   Zwartbles 81.5% 58.1%
   Bleu de Maine 85.7% 76.5%
   Blauwe Texelaar 92.3% 85.0%
   Minor breeds 72.9% 55.9%
  1. * The 168 farms sampled for genotyping (GSF) were part of the postal survey.
  2. ** Because farms may contain animals of more than one breed (see No. breeds per farm), these percentages of breeds do not add up to 100%.
  3. Survey results on farm sizes, breeds used and application of selective breeding. Farms in the genotyped group (GSF) are compared to the rest of the survey (SF minus GSF) as a reference group.